Mac Part Suppliers
From Mac Guides
Other World Computing: ([macsales.com]) They have their own brand of RAM that is very good. Some of their RAM emits a low volume high frequency whine. The sound of the hard drive covers it up so it is only noticeable in sleep mode. They also sell batteries, CPU upgrades, The ModBook (Mac Tablet), HD upgrades, External LCD displays, and External HD's / cases to put your own HD in.
[iFixit] iFixit sells PowerBook, iBook, MacBook, MacBook Pro, MacBook Air and iPod parts. Their prices are high but they offer installation instructions.
[ShaggyMac] ShaggyMac sells MacBook, MacBook Pro, MacBook Air & iPhone Parts & Accessories. They ship Internationally.